KO Black Monochrome Ribbon with OvercoatKO Black Monochrome Ribbon with Overcoat (For Zenius and Primacy) On the back side of the card: K black resin panel O overlay panel Number of prints per roll: up to 600 Cards lifespan: up to 1 year 1 color resin ribbons used for printing text and one color line art on single or dual sided cards. A clear overcoat, which is a protective layer over the entire card.